Vertical transmission and maternal passiveimmunity post-SARS-CoV-2: supplementary data

Since 2020, the highly contagious nature and various transmission routes of SARS-CoV-2 have rendered thepandemic interminable. Vertical transmission (VT) through the placenta and breastmilk, which is frequentfor certain virus types, is thought to exist for SARS-CoV-2 and is hypothesized by many researchers.Conversely, antibodies are produced to counteract the effect of viruses. Since newborns’ immunologicsystem cannot produce proper antibodies, maternal antibodies are usually transferred from mother toinfant/fetus to meet the need. This theory leads to the hypothesis of transmission of antibodies throughthe placenta and breast milk following SARS-CoV-2 infection or vaccination. This paper further discussesthese hypotheses, considering consequences of fetus/infant harm versus benefit.